Environmental Engineering Reference
In-Depth Information
I
II
III
IV
HO
V
H
O
O
VI
O
O
OH
Y
VII
VIII
IX
(X=H, Y=H)
(X=OH, Y=H)
(X=H, Y=OH)
O
X
O
OH
Figure 4.
Structures of biomarkers analyzed from the Holocene sediment core. I:
Chlorobactene [from green coloured species of Chlorobiaceae], II: Isorenieratene, III: β-
isorenieratene [from brown-coloured species of Chlorobiaceae], IV: 4α-methyl-5α-cholest-
8(14)-en-3β-ol [from aerobic methanotrophic bacteria of the family Methylococcaceae], V:
2,6,10,15,19-pentamethylicosane (PMI) [from methanogenic Archaea], VI: GDGT-0 [from
(methanogenic) Archaea], VII: Archaeol (X=H, Y=H) [from (methanogenic) Archaea],
VIII:
sn
2-hydroxyarchaeol (X=OH, Y=H), IX:
sn
3-hydroxyarchaeol (X=H, Y=OH) [from
methanogens; Methanosarcinales, Methanococcales].
